Double-Free Vulnerability in regmap Package
Summary
UVI-2021-1001944: regmap: Fix possible double-free in regcache_rbtree_exit(). Affects Kernel versions >= 3f4ff561bc88b074d5e868dde4012d89cbb06c87, < fc081477b47dfc3a6cb50a96087fc29674013fc2. No fix is published. How to fix ↓
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Background
The regmap package is a component of the Linux Kernel, which is responsible for managing register maps for various devices. It provides an abstraction layer for accessing and manipulating hardware registers. The regcache_rbtree_exit() function within the regmap package is susceptible to a double-free vulnerability.
Vulnerability Detail
The double-free vulnerability in regcache_rbtree_exit() can be exploited by an attacker to cause a denial-of-service (DoS) condition or potentially execute arbitrary code. This vulnerability occurs when the function attempts to free memory that has already been freed, leading to memory corruption and potential system instability. The impact and attack plausibility of this vulnerability have not been proven.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The double-free vulnerability in the regmap package can have serious consequences, including a potential DoS condition or arbitrary code execution. It is crucial to update the Linux Kernel to the latest version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Regmap is a component of the Linux Kernel that manages register maps for devices and provides an abstraction layer for accessing hardware registers.
The vulnerability can lead to a denial-of-service (DoS) condition or potentially allow an attacker to execute arbitrary code.
To fix this vulnerability, update the Linux Kernel to version v4.9.289 or later.
No specific workaround has been mentioned for this vulnerability.
For more details, refer to the vulnerability report at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1001xxx/UVI-2021-1001944.json
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